Rubber mask



June 16, 1931' R. D. LANCASTER 1,810,486

RUBBER MASK Filed June 30, 1928 RA YMQND D. L A NCA 6 TE R PM I W m ATTORNE Y3 Patented June 16, 1931 PATENT OFFICE RAYMOND D. LANCASTER, 0FAKRON, OHIO RUBBER MASK Application filed'June 30,

This invention relates to flexible, elastic, rubber masks for use incomplexion or reducing treatments, or for use in treating cutaneousdiseases.

The general purpose of the invention is to improve upon masks of thistype which have not been entirely satisfactory since they do noteffectually prevent entrance of air under the mask or seal the treatingsubstances therein.

Particularly the invention has for its object a rubber mask so formed asto seal itself about its edge against the face of a wearer by theinherent elasticity or resilience of the mask.

The foregoing and other objects are attained in the mask illustrated inthe accompanying drawings and described below. It is to be understoodthat the invention is not limited to the specific form thereof shown anddescribed.

Of the accompanying drawings,

Figure 1 is a front elevation of a mask embodying the invention;

Figure 2 is a section on line 22 of Figure 1; and

Figure 3 is a detail section through the edge of the mask. I

Referring to the drawings, the numeral 10 designates a mask of rubberwhich may have any suitable fastening elements such as 11, ll

secured theretmThese fastening devices are preferably rubber 'straps,cemented to the edges of the mask. As best shown in Figures 2 and 3, thenormal curvature of the mask is somewhat of less radius than the generalcurvature of the face, whereby there is a substantial inherentcontractile forceaboutthe edge of the mask when applied to the face,

which force acts to seal the edge of the mask. This. curvature is such,however, that when the mask is applied to the face, it fits the face snuly over its whole area.

The e ge of the mask is also preferably provided with a bead 12 oflarger sectionthan the body of the mask which may be tapered to afeather edge 12 rendering the.

bead fin-shaped in section. The fin-shaped bead ma be formed to curveinwardly as illustrate in full lines (Figure 3) sothat when inherent,

1928. Serial N0. 289,369.

the mask is applied, the outer portion of the bead is expanded and holdsitself snugly against the face by the inherent, contractile forcestherein and thus enhancing the sealing action of the mask.

It Will be understood that the mask disclosed herein is capable of anyof the wellknown uses therefor such as face-reducing, complexionbleaching, or treating of skin diseases or blemishes. It seals the maskagainst entry of air. thereunder and also effectively retains treatingsubstances therein.

Modifications of the invention may be resorted to without departing fromthe spirit thereof or the scope of the appended claims.

What is claimed is mask being formed of flexible, elastic rubber,

the normal curvature of the mask being of less radius than the generalcurvature of the face, the edge of the mask being formed with a bead offin-shape, the bead being normally curved inwardly of the mask butadapted to be turned outwardly when applied to the face, whereby themask will fit the face snugly over its whole area and'the edge of themask will seal itself by the action of the inherent, contractile forcestherein.

2. A mask for the purposes set forth, said mask being formed offlexible, elastic rubber, the normal curvature of the mask beirig ofless \radius than the general curvature of the face, the edge of themask being formed with a bead normally turned inwardly but adapted to beturned outwardly when applied to the face, whereby the mask will fit theface snugly over its whole area and the edge of the mask will sealitself by the action of the contractile forces therein. RAYMOND D.LANCASTER.

